<template>
    <div>
      <!--      面包屑导航区域-->
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
<!--      卡片视图区域-->
      <el-card>
<!--        提示区域-->
        <el-alert
          title="添加商品信息"
          type="info"
          center
          :closable="false"
          show-icon>
        </el-alert>
<!--        步骤条区域-->
        <el-steps :space="200" align-center :active="activeIndex - 0" finish-status="success">
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
<!--        Tab栏区域 用form包裹-->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
          <el-tabs @tab-click="tabClicked" :before-leave="beforeTbaLeave" v-model="activeIndex" tab-position="left">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.goods_number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader
                  v-model="addForm.goods_cat"
                  :options="cateList"
                  :props="cateProps"
                  @change="handleChange">
                </el-cascader>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
<!--              渲染表单item项-->
              <el-form-item :label="item.attr_name" v-for="item in manyTableDate" :key="item.attr_id">
<!--                复选框组-->
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox
                    border
                    v-for="(cb, i) in item.attr_vals"
                    :key="i"
                    :label="cb"></el-checkbox>
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item
                :label="item.attr_name"
                v-for="item in onlyTableData"
                :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
<!--              //  action="" 图片要上传地址-->
              <el-upload
                :on-success="handleSuccess"
                :headers="headerObj"
                :action="uploadUrl"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture">
                <el-button size="small" type="primary">点击上传</el-button>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
<!--              富文本编辑器组件-->
              <quill-editor v-model="addForm.goods_introduce"/>
<!--              添加商品按钮-->
              <el-button @click="add" type="primary" class="btnAdd">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </el-card>
<!--      图片预览对话框-->
      <el-dialog
        title="图片预览"
        :visible.sync="previewVisiable"
        width="50%">
        <img :src="previewPath" alt="" class="previewImg">
      </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'Add',
  data () {
    return {
      activeIndex: '0',
      // 添加表单
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片数组
        pics: [],
        // 商品详情描述
        goods_introduce: '',
        // 商品的参数（数组），包含 `动态参数` 和 `静态属性`
        attrs: []
      },
      // 添加表单验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      cateList: [],
      // 级联选择器配置对象
      cateProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 动态参数列表数据
      manyTableDate: [],
      // 静态属性参数列表
      onlyTableData: [],
      // 上传图片url地址
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览地址
      previewPath: '',
      previewVisiable: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.$message.success('获取商品分类数据成功')
      this.cateList = res.data
      console.log(this.cateList)
    },
    // 级联选择器选中变化
    handleChange () {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 切换标签之前的钩子，若返回 false 或者返回 Promise 且被 reject，则阻止切换。
    beforeTbaLeave (activeName, oldActiveName) {
      // console.log('即将进入' + activeName)
      // console.log('即将离开' + oldActiveName)
      // return false //阻止跳转
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked () {
      console.log(this.activeIndex)
      // 访问动态参数面板
      if (this.activeIndex === '1') {
        console.log('动态参数面板')
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        this.$message.success('获取动态参数列表成功')
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableDate = res.data
        console.log(this.manyTableDate)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败')
        }
        this.onlyTableData = res.data
        this.$message.success('获取静态属性成功')
        console.log(this.onlyTableData)
      }
    },
    // 处理图片预览事件
    handlePreview (file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisiable = true
    },
    // 处理移出图片操作
    handleRemove (file) {
      console.log(file)
      // 获取将要删除的图片临时路径
      const filePath = file.response.data.tmp_path
      // 从pics数组中 找到这个图片对应的索引值
      var index = this.addForm.pics.findIndex(item => {
        console.log(item)
        if (item.pic === filePath) {
          return true
        }
      })
      console.log(index)
      // 调用数组splice方法 把图片信息对象 从pics数组中移出
      this.addForm.pics.splice(index, 1)
      console.log(this.addForm.pics)
    },
    // 监听图片上传成功事件
    handleSuccess (response) {
      // 拼接得到一个图片信息对象
      console.log(response.data.tmp_path)
      const picInfo = { pic: response.data.tmp_path }
      // 将图片信息对象 push到pics数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    // 添加商品
    add () {
      console.log(this.addForm)
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！！！')
        }
        // loadsh 进行深拷贝
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数和静态属性表
        this.manyTableDate.forEach(item => {
          console.log(item)
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          console.log(newInfo)
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style scoped>
.el-checkbox{
  margin: 0 5px!important;
}
.previewImg{
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}
</style>
